Datasheet

–2–
AD9281–SPECIFICATIONS
(AVDD = +3 V, DVDD = +3 V, F
SAMPLE
= 28 MSPS, VREF = 2 V, INB = 0.5 V, T
MIN
to T
MAX
unless otherwise noted)
Parameter Symbol Min Typ Max Units Condition
RESOLUTION 8 Bits
CONVERSION RATE F
S
28 MHz (32 MHz at +25°C)
DC ACCURACY
Differential Nonlinearity DNL ± 0.1 LSB REFT = 1.0 V, REFB = 0.0 V
Integral Nonlinearity INL ± 0.25 LSB
Differential Nonlinearity (SE)
1
DNL ±0.2 ± 1.0 LSB REFT = 1.0 V, REFB = 0.0 V
Integral Nonlinearity (SE)
1
INL ± 0.3 ± 1.5 LSB
Zero-Scale Error, Offset Error E
ZS
± 1 ± 3.2 % FS
Full-Scale Error, Gain Error E
FS
± 1.2 ± 5.4 % FS
Gain Match ± 0.2 LSB
Offset Match ± 1.2 LSB
ANALOG INPUT
Input Voltage Range AIN –0.5 AVDD/2 V
Input Capacitance C
IN
2pF
Aperture Delay t
AP
4ns
Aperture Uncertainty (Jitter) t
AJ
2ps
Aperture Delay Match 2 ps
Input Bandwidth (–3 dB) BW
Small Signal (–20 dB) 240 MHz
Full Power (0 dB) 245 MHz
INTERNAL REFERENCE
Output Voltage (1 V Mode) VREF 1 V REFSENSE = VREF
Output Voltage Tolerance (1 V Mode) ± 10 mV
Output Voltage (2 V Mode) VREF 2 V REFSENSE = GND
Output Voltage Tolerance (2 V Mode) ± 15 mV
Load Regulation (1 V Mode) VREF ± 10 ± 35 mV 1 mA Load Current
Load Regulation (2 V Mode) ± 15 mV 1 mA Load Current
POWER SUPPLY
Operating Voltage AVDD 2.7 3 5.5 V
DVDD 2.7 3 5.5 V
Supply Current I
AVDD
75 mA
I
DVDD
0.1 mA
Power Consumption P
D
225 260 mW
Power-Down 16 mW STBY = AVDD, Clock Low
Power Supply Rejection PSR 0.15 0.75 % FS
DYNAMIC PERFORMANCE
2
Signal-to-Noise and Distortion SINAD
f = 3.58 MHz 46.4 49.1 dB
f = 14 MHz 48 dB
Signal-to-Noise SNR
f = 3.58 MHz 47.8 49.2 dB
f = 14 MHz 48.5 dB
Total Harmonic Distortion THD
f = 3.58 MHz –67.5 –49.5 dB
f = 14 MHz –60 dB
Spurious Free Dynamic Range SFDR
f = 3.58 MHz 49.6 65 dB
f = 14 MHz 56 dB
Two-Tone Intermodulation Distortion
3
IMD –58 dB f = 44.9 MHz and 45.52 MHz
Differential Phase DP 0.2 Degree NTSC 40 IRE Mod Ramp
Differential Gain DG 0.08 % F
S
= 14.3 MHz
Crosstalk Rejection –62 dB
REV. F